package net.xdclass.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import lombok.extern.slf4j.Slf4j;
import net.xdclass.model.LoginUser;

import java.util.Date;

/**
 * @author ：zhouyang
 * @date ：Created in 2022/5/7 21:52
 * @modified By：
 * @version: $
 */
@Slf4j
public class JWTUtil {

    /**
     * 主题
     */
    private static final String SUBJECT = "xdclass";
    /**
     * 加密密钥
     */
    private static final String SECRET = "xdclass.net168";
    /**
     * 令牌前缀
     */
    private static final String TOKNE_PREFIX = "dcloud-link";
    /**
     * token过期时间，7天
     */
    private static final long EXPIRED = 1000 * 60 * 60 * 24 * 7;
    public static String geneJsonWebToken(LoginUser loginUser) {
        if (loginUser == null) {
            throw new NullPointerException("对象为空");
        }
        String token = Jwts.builder().setSubject(SUBJECT)
                //配置payload
                .claim("head_img", loginUser.getHeadImg())
                .claim("account_no", loginUser.getAccountNo())
                .claim("username", loginUser.getUsername())
                .claim("mail", loginUser.getMail())
                .claim("phone", loginUser.getPhone())
                .claim("auth", loginUser.getAuth())
                .setIssuedAt(new Date())
                .setExpiration(new Date(CommonUtil.getCurrentTimestamp() + EXPIRED))
                .signWith(SignatureAlgorithm.HS256, SECRET).compact();

        token = TOKNE_PREFIX + token;
        return token;
    }


    public static Claims checkJWT(String token) {
        try {
            Claims claims = Jwts.parser().setSigningKey(SECRET).parseClaimsJws(token.replace(TOKNE_PREFIX, "")).getBody();
            return claims;
        } catch (Exception e) {
            log.info("jwt 解密失败");
            return null;
        }

    }
}
